Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.008
Publication date: 7th February 2022
Several works focused on studying the properties of 2D materials[1],[2] and on trying to optimize their production[3],[4], in order to employ them as active components for different applications. However, the use of pristine 2D materials is often not enough to target specific uses and therefore chemical functionalization can come into play as a versatile method to tune and bring additional properties to the nano sheets.
In this contribution, we will report on our work carried out on the functionalization and cross-linking of liquid-exfoliated graphene and 2D MoS2 to produce tridimensional networks, using polymers as cross-linkers between the different nano-sheets. The chemical functionalization is the key to the construction of such networks: for graphene we employ the Tour reaction[5] to directly bind ad-hoc decorated aryl moieties on the basal plane that are then exploited to connect the sheets to each other through a polymerization reaction. For 2D MoS2, instead, bifunctional thiols are employed to both functionalize and cross-link the material in a one pot reaction. The formation of hydrogels is facilitated by the use of cross-linkers well-known for their gelation properties such poly-acrylates and poly ethylene glycols. A subsequent step of freeze-drying allows to obtain the corresponding aerogels, composite materials characterized by high surface areas available for exchange processes, like catalysis or charge-discharge.
The resulting networks are characterized by a combination of techniques to infer the structural and electronic properties. The electrochemical characterization further allows to infer the potential for use of this materials in electrocatalysis and in energy storage applications.
This work is supported by the European Commission through the H2020 FET-PROACTIVE-EIC-07-2020 project LIGHT-CAP (project number 101017821).
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